a new Fossil Animal '. 
591 
Geological Seat of the Remains of the Plesiosaurus^ and other Saurian 
Remains found in this Island . 
We are as yet acquainted with no instance of the occurrence 
of the remains of the Plesiosaurus in any other formation than the 
lias, where they have been found in Dorsetshire, Somersetshire, 
Gloucestershire, and Leicestershire, in the same localities with those 
of the Ichthyosaurus. 
In conclusion, we shall submit, in order to attract more general 
notice to the enquiry, a short list of the other varieties of Saurian 
animals, which, as far as our knowledge extends, have been found 
in a fossil state in this island. 
We have never seen any genuine remains of the crocodile in the 
lias of the southern counties ; those which have been usually con- 
sidered as such really belonging to the Plesiosaurus. This also is 
the case with the specimen discovered by Stukely at Newark in 
Nottinghamshire, and described in the Philosophical Transactions, 
which, from the imperfection of the plate there given, M. Cuvier 
was led to consider as a crocodile. We have not however, as yet, 
had an opportunity of examining the bones from Whitby. 
Remains of an undoubted species of crocodile, somewhat re- 
sembling the Gavial, have been found in the upper beds of the great 
oolite, or in the Cornbrash, for the distinction between these beds 
cannot in that part of the country be ascertained, at Gibraltar, 
eight miles north of Oxford, on the river Cherwell ; the vertebras of 
this variety agree with the second species from Honfleur, described 
by M. Cuvier, in having both faces of the vertebrae slightly 
concave like the Plesiosaurus ; but their proportions, articulating 
surfaces for the ribs, &c. agree closely with the crocodile, as does 
the head, which has also been found. 
Vol. V. 4 F 
